ATE111253T1 - OPTICAL DISC RECORDING/PLAYBACK DEVICE. - Google Patents

OPTICAL DISC RECORDING/PLAYBACK DEVICE.

Info

Publication number
ATE111253T1
ATE111253T1 AT87904951T AT87904951T ATE111253T1 AT E111253 T1 ATE111253 T1 AT E111253T1 AT 87904951 T AT87904951 T AT 87904951T AT 87904951 T AT87904951 T AT 87904951T AT E111253 T1 ATE111253 T1 AT E111253T1
Authority
AT
Austria
Prior art keywords
regions
laser diode
optical head
data
optical disc
Prior art date
Application number
AT87904951T
Other languages
German (de)
Inventor
Hiroshi Ogawa
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP61180925A external-priority patent/JPH0816994B2/en
Priority claimed from JP61190274A external-priority patent/JPH083905B2/en
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of ATE111253T1 publication Critical patent/ATE111253T1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

An optomagnetic disc that has tracks, e.g., 2 byte pit regions (2a) for servo purposes and, e.g., 16 byte data write-in regions (2b) alternately defined is rotated at a set angular speed. An optical head has a laser diode for producing light to irradiate the disc. A reference clock pulse generator produces clock pulses in response to detection of servo pit regoins by the optical head. A lser drive section effects pulsed drive of the laser diode to erase or write data in data regions in synchronism with the reference clock timing.
AT87904951T 1986-07-31 1987-07-29 OPTICAL DISC RECORDING/PLAYBACK DEVICE. ATE111253T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61180925A JPH0816994B2 (en) 1986-07-31 1986-07-31 Disk recorder
JP61190274A JPH083905B2 (en) 1986-08-13 1986-08-13 Laser diode automatic output control circuit

Publications (1)

Publication Number Publication Date
ATE111253T1 true ATE111253T1 (en) 1994-09-15

Family

ID=26500278

Family Applications (1)

Application Number Title Priority Date Filing Date
AT87904951T ATE111253T1 (en) 1986-07-31 1987-07-29 OPTICAL DISC RECORDING/PLAYBACK DEVICE.

Country Status (6)

Country Link
US (1) US5042022A (en)
EP (1) EP0276326B1 (en)
KR (1) KR950010334B1 (en)
AT (1) ATE111253T1 (en)
DE (1) DE3750507T2 (en)
WO (1) WO1988001092A1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2669532B2 (en) * 1988-05-20 1997-10-29 株式会社日立製作所 Optical disk drive
JPH02130727A (en) * 1988-11-10 1990-05-18 Sony Corp Discoid recording medium
JPH077509B2 (en) * 1989-02-20 1995-01-30 オムロン株式会社 2 light source type optical recording / reproducing apparatus
US5276667A (en) * 1989-02-22 1994-01-04 Omron Corporation Optical recording and reproducing apparatus for synchronizing recording on subsequent unrecorded sectors
EP0384405B1 (en) * 1989-02-22 1995-05-03 Omron Corporation Optical recording and reproducing apparatus
JP2698784B2 (en) * 1989-07-21 1998-01-19 シャープ株式会社 Information recording / reproducing device
US5426674A (en) * 1990-02-06 1995-06-20 Nemirovsky; Paul Method and computer system for selecting and evaluating data routes and arranging a distributed data communication network
JPH0497816A (en) * 1990-08-16 1992-03-30 Omron Corp Controller of molding machine
US5729511A (en) * 1991-02-15 1998-03-17 Discovision Associates Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
US5809282A (en) * 1995-06-07 1998-09-15 Grc International, Inc. Automated network simulation and optimization system
JP3048945B2 (en) * 1996-05-24 2000-06-05 三洋電機株式会社 Information recording / reproducing device
KR19990016023A (en) * 1997-08-12 1999-03-05 윤종용 Laser diode light output control method and device
US6269060B1 (en) 1999-09-09 2001-07-31 Ian E. Harvey Programmable write signal generator
JP2002063726A (en) * 2000-06-05 2002-02-28 Nippon Precision Circuits Inc Laser diode control method of optical disk player and its circuit
US7558165B2 (en) * 2004-05-07 2009-07-07 Samsung Electronics Co., Ltd. Disc drive calibration with forced track traversing signal

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616950A (en) * 1979-07-19 1981-02-18 Mitsubishi Electric Corp Optical information read-in unit
JPS57181429A (en) * 1981-05-01 1982-11-08 Toshiba Corp Optical disc device
JPS5814333A (en) * 1981-07-17 1983-01-27 Matsushita Electric Ind Co Ltd Recording method for optical disc
JPS58143333A (en) * 1982-02-19 1983-08-25 Dainippon Screen Mfg Co Ltd Multi-face printing machine
JPS58153239A (en) * 1982-03-05 1983-09-12 Nec Corp Optical pickup device
JPS5945646A (en) * 1982-09-07 1984-03-14 Hitachi Ltd Optical information reproducer
GB8330101D0 (en) * 1983-11-11 1983-12-21 Combined Tech Corp Plc Optical data storage
JPS60239929A (en) * 1984-05-15 1985-11-28 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPH0619863B2 (en) * 1984-06-13 1994-03-16 株式会社日立製作所 Magneto-optical information storage method and device
JP2619850B2 (en) * 1984-07-10 1997-06-11 松下電器産業株式会社 Information recording medium
JPH0821173B2 (en) * 1984-07-27 1996-03-04 松下電器産業株式会社 Semiconductor laser drive circuit
JPS6163930A (en) * 1984-09-04 1986-04-02 Matsushita Electric Ind Co Ltd Disk recording carrier
JPS61190472A (en) * 1985-02-08 1986-08-25 株式会社日立製作所 Magazine with stopper
JPH0721895B2 (en) * 1985-02-19 1995-03-08 日本電気株式会社 Magneto-optical recording method
DE3685358D1 (en) * 1985-03-27 1992-06-25 Sony Corp SIGNAL RECORDING AND PLAYBACK DEVICE FOR AN OPTOMAGNETIC DISK.
DE3679233D1 (en) * 1985-05-21 1991-06-20 Celanese Corp METHOD FOR DELETING OPTICAL INFORMATION MEDIA.
US4685097A (en) * 1985-07-25 1987-08-04 Laser Magnetic Storage International Company Power control system for a semiconductor laser
JP2528821B2 (en) * 1985-11-20 1996-08-28 株式会社日立製作所 Optical information processing device
EP0228646A3 (en) * 1985-12-20 1987-10-14 Hitachi, Ltd. A signal processing apparatus for disc memory devices
JP2574752B2 (en) * 1986-01-22 1997-01-22 株式会社日立製作所 Information recording medium and recording / reproducing method
JPH07111782B2 (en) * 1986-08-13 1995-11-29 ソニー株式会社 Optical disc recording / reproducing device
JPH06122450A (en) * 1992-10-08 1994-05-06 Dainippon Ink & Chem Inc Four-side insertion plastic pallet

Also Published As

Publication number Publication date
EP0276326A4 (en) 1989-09-11
US5042022A (en) 1991-08-20
EP0276326B1 (en) 1994-09-07
KR950010334B1 (en) 1995-09-14
KR880701941A (en) 1988-11-07
DE3750507T2 (en) 1995-01-12
DE3750507D1 (en) 1994-10-13
WO1988001092A1 (en) 1988-02-11
EP0276326A1 (en) 1988-08-03

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee